A 1-paragraph summary of the text is as follows: This tutorial guides users in building a COVID-19 alert subscription system using Vue.js, Node.js, Twilio Programmable SMS, and Twilio SendGrid. The system allows users to subscribe for alerts by location, sends SMS notifications when new cases are reported, and emails subscribers with updates on confirmed, discharged, and death cases. The application includes two main pages: a user-facing page where users can subscribe and admins can send alerts via email or SMS, and an admin dashboard that displays locations and subscriptions. Users learn how to set up the backend service using Node.js and Express, connect to Twilio APIs for messaging, and implement routes and forms in Vue.js.